Another of the many interesting "hidden piece" puzzles that Alfons Eyckmans has designed. This interesting shaped 18 piece burr has one of its three axes elongated, this is to accommodate for the extra two hidden pieces. Like all burr puzzles with extra hidden pieces the extra pieces restrict movement to adjacent pieces. This is a puzzle that behaves differently than usual burr puzzles and the extra pieces make for a longer and more interesting disassembly.